File claims it contains 0 faces and 0 vertices but in scene view all object names show
Viewing a layer which has no objects

maybe you accidentally switched the visible layer to a layer which contains no objects.



For example if you have all your objects on the first layer (called layer 0), but are viewing the second layer, you won't see anything. Verts/Faces/Tris will say 0, even if the Objects are in the scene.

Pressing the numeric keys 1, 2, 3... will switch current layer, it is possible that you accidentally pressed one of those.